lnet/lnet/lo.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
   4  * Use is subject to license terms.
   5  *
   6  * Copyright (c) 2017, Intel Corporation.
   7  */
   8
   9 /* This file is part of Lustre, http://www.lustre.org/ */
  10
  11 #define DEBUG_SUBSYSTEM S_LNET
  12 #include <lnet/lib-lnet.h>
  13
  14 static int
  15 lolnd_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg)
  16 {
  17         LASSERT(!lntmsg->msg_routing);
  18         LASSERT(!lntmsg->msg_target_is_router);
  19
  20         return lnet_parse(ni, &lntmsg->msg_hdr, &ni->ni_nid, lntmsg, 0);
  21 }
  22
  23 static int
  24 lolnd_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
  25            int delayed, unsigned int niov,
  26            struct bio_vec *kiov,
  27            unsigned int offset, unsigned int mlen, unsigned int rlen)
  28 {
  29         struct lnet_msg *sendmsg = private;
  30
  31         if (lntmsg) {                   /* not discarding */
  32                 lnet_copy_kiov2kiov(niov, kiov, offset,
  33                                     sendmsg->msg_niov,
  34                                     sendmsg->msg_kiov,
  35                                     sendmsg->msg_offset, mlen);
  36
  37                 lnet_finalize(lntmsg, 0);
  38         }
  39
  40         lnet_finalize(sendmsg, 0);
  41         return 0;
  42 }
  43
  44 static int lolnd_instanced;
  45
  46 static void
  47 lolnd_shutdown(struct lnet_ni *ni)
  48 {
  49         CDEBUG (D_NET, "shutdown\n");
  50         LASSERT(lolnd_instanced);
  51
  52         lolnd_instanced = 0;
  53 }
  54
  55 static int
  56 lolnd_startup(struct lnet_ni *ni)
  57 {
  58         LASSERT (ni->ni_net->net_lnd == &the_lolnd);
  59         LASSERT (!lolnd_instanced);
  60         lolnd_instanced = 1;
  61
  62         return (0);
  63 }
  64
  65 const struct lnet_lnd the_lolnd = {
  66         .lnd_type       = LOLND,
  67         .lnd_startup    = lolnd_startup,
  68         .lnd_shutdown   = lolnd_shutdown,
  69         .lnd_send       = lolnd_send,
  70         .lnd_recv       = lolnd_recv
  71 };